# What does CodeSandbox use?

CodeSandbox (codesandbox.io) shows public evidence of 14 tools, according to runsonwhat (last checked 2026-10-21).

## Edge & Hosting

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Cloudflare](https://www.runsonwhat.com/reverse/cloudflare) | CDN & Edge | DNS records, Email records, Website code |  |
| [Google Cloud](https://www.runsonwhat.com/reverse/gcp) | Hosting & Cloud | Website code |  |

## Application

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Fonts](https://www.runsonwhat.com/reverse/google-fonts) | Media & UI | Website code |  |
| [React](https://www.runsonwhat.com/reverse/react) | Frontend | Website code |  |
| [Adobe Fonts](https://www.runsonwhat.com/reverse/adobe-fonts) | Media & UI | Website code |  |
| [Next.js](https://www.runsonwhat.com/reverse/nextjs) | Frontend | Website code |  |

## Data & Observability

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Sentry](https://www.runsonwhat.com/reverse/sentry) | Monitoring | Website code |  |
| [web-vitals](https://www.runsonwhat.com/reverse/web-vitals) | Monitoring | Website code |  |
| [PostHog](https://www.runsonwhat.com/reverse/posthog) | Analytics | Website code |  |
| [Amplitude](https://www.runsonwhat.com/reverse/amplitude) | Analytics | Website code |  |
| [Better Stack](https://www.runsonwhat.com/reverse/betterstack) | Monitoring | Custom domain |  |

## Company Ops

| Tool | Category | Evidence | Since |
|---|---|---|---|
| [Google Workspace](https://www.runsonwhat.com/reverse/google-workspace) | Workspace | Email records, Website code |  |
| [Mailgun](https://www.runsonwhat.com/reverse/mailgun) | Email Delivery | Email records, Website code |  |

## Recent changes at CodeSandbox

- 2026-10-21: started using [Adobe Fonts](https://www.runsonwhat.com/reverse/adobe-fonts)
- 2026-10-21: started using [Google Fonts](https://www.runsonwhat.com/reverse/google-fonts)

## FAQ

### What tools does CodeSandbox use?

As of October 2026, runsonwhat has found 14 tools at CodeSandbox (codesandbox.io) in public records. Edge & Hosting: Cloudflare and Google Cloud. Application: Google Fonts, React and Adobe Fonts. Data & Observability: Sentry, web-vitals and PostHog. Company Ops: Google Workspace and Mailgun. Last checked October 21, 2026.

### What cloud does CodeSandbox run on?

CodeSandbox uses Google Cloud for hosting and cloud infrastructure, according to runsonwhat (October 2026). runsonwhat found Google Cloud through Google Cloud code on codesandbox.io. Google Cloud is used by 76,314 companies runsonwhat tracks.

### What email provider does CodeSandbox use?

CodeSandbox uses Google Workspace for email and office software, according to runsonwhat (October 2026). runsonwhat found Google Workspace through email records that authorize Google Workspace and code on codesandbox.io. Google Workspace is used by 406,528 companies runsonwhat tracks.

### What analytics tools does CodeSandbox use?

CodeSandbox uses PostHog for analytics, alongside Amplitude, according to runsonwhat (October 2026). runsonwhat found PostHog through PostHog code on codesandbox.io. PostHog is used by 10,315 companies runsonwhat tracks.

### What monitoring tools does CodeSandbox use?

CodeSandbox uses Sentry for monitoring, alongside web-vitals and Better Stack, according to runsonwhat (October 2026). runsonwhat found Sentry through Sentry code on codesandbox.io. Sentry is used by 79,340 companies runsonwhat tracks.

### Does CodeSandbox use Google Fonts?

Yes. runsonwhat found Google Fonts at CodeSandbox through Google Fonts code on codesandbox.io. Google Fonts is a Media & UI tool used by 818,571 companies runsonwhat tracks.

### Has CodeSandbox changed tools recently?

Yes. On runsonwhat's rechecks, CodeSandbox started using Adobe Fonts and Google Fonts (latest on October 21, 2026). A change counts only between two checks of codesandbox.io done the same way.

### Which companies have a tech stack similar to CodeSandbox's?

The companies with the stacks most like CodeSandbox's are Circularise, Milu Health, OneFirewall Alliance and Tracksmith, according to runsonwhat (October 2026). Each shares 3 to 7 tools with CodeSandbox, and rare tools count for more than common ones like Google Workspace, so the match reflects real stack choices.

### How does runsonwhat know what CodeSandbox uses?

runsonwhat reads public records only. Of the 14 tools at CodeSandbox, 9 were found through code on codesandbox.io, 2 through DNS records, 2 through email records and 1 through subdomains that point at the vendor. A tool is listed only when a direct record backs it up; DNS is rechecked weekly and codesandbox.io about monthly.


---

Source: runsonwhat, https://www.runsonwhat.com/company/codesandbox.io (updated October 2026). Counts are companies with direct public evidence of the tool (DNS records, certificates, website code, a real-browser crawl, subprocessor lists), so they are lower bounds. Methodology: https://www.runsonwhat.com/methodology.